Weft-detector-withdrawing means



March 27, 1928.

y. H. JENNINGS WEFT DETECTOR WITHDRAWING MEANS Filed May 13. 1926 2 Shuts-Shoot I INN/ENTQR. VICT o R H JENNINGS ATTORNEyS 2 Sheets-Sheet 3 March 27, 1928.

V. H. JENNINGS WEFT DETECTOR WITHDRAWING MEANS Filed May 13. 1926 VICTOR H. JENNINGS W fi Patented Mar. 27, 1928.

UNITED STATES PATENT OFFICE.

VICTOR H. JENNINGS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CBOMIPTON d} KNOWLES LOOM \VORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION 01' MASSACHUSETTS.

WEFT-DETECTOR--WITHDRAWING MEANS.

Application filed May 13, 1926. Serial No. 108,942.

This invention relates to improvements in weft detectors for looms and more particularly to improved means for withdrawing a fecler of the side slip type.

In weftreplenishing looms employing a plurality of colors the weft detect-or is usually mounted on the magazine side of the loom and must therefore be moved to inoperative position on the transferring pick in order not. only to clear the path of the incoming bobbin but to prevent a repetition of the indieation of weft exhaustion. It is the principal object of my present invention to provide improved means for withdrawing a side slip weftdetcctor made of a relatively light bent wire one end of which is roughened to detect the yarn and the other end of which serves as a pivot about which the detector swings on the indicating beats of the loom.

Detectors of the type specified are usually held in normal position by a light spring and it is a. further object of my invention to apply the withdrawing force to the detector at such a point as will permitthe spring to prevent an indicating side movement of the detector on the withdrawing stroke.

It is a still further object of my invention to employ a side slip movement of the detector in conjunction with light devices including a cam surface which will act to indicate weft exhaustion when the detector slide-s along an empty bobbin.

"With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I hai e shown a convenient embodiment of my invention,

Fig. 1 is a top plan view of a weft detector embodying my invention, the foot of the weft replenishing mechanism being shown in section and the bobbin and shuttle being indicated in dotted lines,

Fig. 2 is a vertical section on line 2-2 of Fig. 1. looking in the direction of the arrows,

Fig. 3 is a front elevation of the detector on a reduced scale looking in the direction of arrow 3, Fig. 1,

Fig. 4 is a detail view of the detector with the cap removed showing the detector in withdrawn position,

Fig. 5 is an enlarged fragmentary section taken on line 55 of Fig. 1 looking in the direction of the arrows, and

Fig. 6 is a vertical section on line 6-6 of Fig. 4:.

Referring particularly to Figs. 1, 2, and 8 it will be seen that I have provided a loomside 10 and breast beam 11 on which is mounted the frame 12 of a weft replenishing mechanism preferably of the multi-color type such as set forth in Patent No. 1,030,748. The frame 12 is provided with a stud 13 on which is pivotally mounted the hub 14 of a transferrer lever 15 the rear bobbin engaging 'arm 16 of which extends over the shuttle S and bobbin B when the lay is on front center. The transferrer arm has depending legs 17 between which extends a stud 18 by means of which the transferrer is given a downward movement on the transferring pick of the loom by connections not shown.

A stand 19 is bolted to the loom frame and has vertically reciprocably mounted therein a block 20 on which is pivoted an actuator lever 21 the inner end of which is connected to a magazine actuating rod 22 and the other end of which lies in slot 23 formed in the stand. When there is sufficient weft present for continued weaving the actuator lever 21 will be free to descend in slot 23, but when insufficient weft is present a controller pin 24 will be under the outer end of the actuator lever 21 and as the block 20 descends rod 22 will be given a downward movement to initiate replenishment. The matter thus far described is of common construction and may be as set forth in the aforesaid patent, the only difference being that controller pin 24: is somewhat different from that shown in the aforesaid patent.

In carrying out my invention I provide a bracket 30 to which is bolted a stand 31 having a horizontal slot 32 to receive a bolt 33 which passes through a vertical slot 34 formed in support 35. The upper part of the. support is flattened as at 36 to form the lower portion of a detector housing the upper part of which is provided by a cap 3 The support is provided with a boss 38 and is surrounded for the most part by an up- 42 which defines a notch 43.

The detector which I employ is formed of a single piece of wire D bent at the rear portion thereof and having teeth 44 out therein, the forwardly extending portion of the wire being curved as indicated in Fig. l. and normally lying in contact with shoulder 41. Said wire is provided with a bent portion 45 and a. straight portion extending to "the left as indicated at 46. The ex treme forward end or the wire is formed as a pivot indicated at 47 so proportioned as to be received in notch 43. The distance be tween the right hand portion of the bend 45 and the left end of the detector is slightly lessthan the distance between the inside side walls oi the flange 39, the purpose of this construction being to prevent undue lateral movement of the detector. The forward por- 'tion or the wire is provided with a crimp 4-8 which receives the forward end of a coil spring 49, the rear end of which is received by a projection 50 cast on the support. The normal function of. the spring 49 is to hold the pivot portion 47 in the notch 43 and the curved rearwardly extending part of the detector against shoulder 41 thus positioning said detector for proper engagement with the surface to be detected.

My invention relates more particularly to the method of moving the controller pin 24 by means of lateral movement of the detector l) and also to means for moving the latter forwardly out of the path of the incoming bobbin on transferring beats of the lay without causing a second indication of the detector. in carrying out this part of my invention I provide the right hand flange oi the support with a slot 51 through which projects the lower end 52 of a transmitter wire 1, the said wire extending to the left as indicated in Fig. 1 and being formed with an inclined portion 53 which cooperates with a fixed guide 54. Said guide is formed pref erably of a wire and has a loop 55 through which extends a retainin screw 56 and also a rearwardly extending diagonally disposed finger 57 which straddles the inclined portion 53 ot the transmitter wire T and is so placed as to cooperate with the latter when the transmitter is moved. As shown in: Fig. 2 the controller pin 24 is formed as the lower le of a U-shaped member C slidable in stand 19, a spring 58' surrounding thencontroller E24 and. pushing against the stand to hold the member C in the position indicated in Fig. 2. The upper leg of the member C is extended across slot 23 as at 61 to cooperate with the actuator lever 21 on non-indicating picks of the loom, as set forth in the aforesaid patent. A cotter pin i eoa eae 62 limits movement oil the member C under action of the spring 58.

In order to provide for withdrawing the detector I provide a light wire W booked as at- 59 to extend behind the detector D at a point between the pivot end 41' and the crimp 48 and said wire has the forward portion thereof looped as at ('30 to pass around an extension of the stud 18 as shown in Figs. 1, 2, and The wire lv extends through a notch 63 formed in the forward flange 39 and the hook 5i extends downwardly and is guided by a rib (S4 :t'm'mcd in the support Upward displacement of the wire \V is prevented by cap 37.

Under normal conditions the parts will be as indicated in full lines in Fig. l and as the lay moves forwardly the teeth 44 of detector D will engage the bobbin. It the latter is provided with sullicient yarn the teeth 44 will be embedded in the yarn and lateral movement of the detector D will be prevented, the detector moving forwardly as a whole away from boss 38 without an gular movement and, against the action of light tension spring 5). The curved per-- tion of the detector will under these condb tions move past the short lower end 5:2 oi the transmitter without moving the same. lV hen insufficient yarn is present, however, the teeth 44 will not be embedded sulliciently to prevent angular movement of the detector and the latter will move about notch 42 as a pivot, assuming the dotted line position indicated in Fig. 1. ll hcn this takes place the detector will. move the transmitter to the right causing the inclined portion 53 to move along the finger 57. As the latter is fixed the inclined part will cause the transmitter to move forwardly against the upright part of member G against the ac- .tion of spring 50 to move controller pin 24 under the actuator lever 21. At this time the block 20 descends, as previously described, but the right hand end oi the actuator will be held up by the controller to cause a depression of CODIIQCt/(H 22 with resultant initiation oi? a we'lt change.

At a subsequent pick of the loom when the indicating shuttle again arrives on the detector side of the loom the transicrrer arm 16 will descend as previously indicated to place a new bobbin in the empty shuttle and this movement will be accompanied by a forward movement of the log it, the latter moving from the full to the dotted line posh tion indicated in r 2. This is accompanied by a forward movement oi the withdrawing wire iv, the latter pulling the detcctor D to the position indicated. in Fig. 4 against the action of spring During this forward. movement the curved portion of the detector engages the shoulder 41 and the bent portion 45 slides along the adjacent flange 39 and angular movement of the rite tector is prevented by reason of the fact that the spring applies its force at a point between the withdrawing wire IV and the:

shoulder 41. For this reason the detector will be withdrawn from the path of the illcoming bobbin and the transmitter will remain at rest without being actuated and therefore without giving a second indication to the connector From the foregoing it will be seen that I have provided means for withdrawing an angularly movable weft detector by applying a withdrawing force thereto at such a point as will prevent a repeated indication. It will further be seen that the guide 54 can be adjusted by means of slot 55 and screw 56 to vary the position of the controller pin with respect to the actuator lever. It will also be seen that the controller pin is pro vided with a vertical portion which cooperates with the left hand end of the transmitter T as viewed in Fig. 1 and that for all positions of the controller pin 21 stop pin 61 will be in operative relation with respect to the actuator lever 21.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is:

1. In a weft detector for weft replenishing looms, a support, a side slipping weft detector mounted on the support and having an angular movement on indicating beats of the loom and having a forward sliding movement on non-indicating detecting beats of the loom relatively to the support, means defining a pivotal connection between the detector and the support about which the detector swings on indicating beats of the loom, resilient means connected to the detector to hold the same in normal position, and withdrawing means for the detector having connection with the latter at a point intermediate the pivotal connection and the point at which the resilient means is connected to the detector, said withdrawing means moving the detector away from said means defining the pivotal connection.

2. In a weft detector for weft replenishing looms, a support, a side slipping weft detector mounted on the support and having an angular movement on indicating beats of the loom and having a forward sliding movement on non-indicating detecting beats of the loom relatively to the support, a shoulder formed on the support and located adjacent a portion of the detector, means defining a pivotal connection between the detector and support, resilient means connected to the detector to hold the same in normal position with a portion thereof adjacent the shoulder, and withdrawing means operative on transferring beats of the loom to move the detector out of the path of the incoming bobbin, said withdrawing means being applied to the detector at a point intermediate the aforesaid pivotal connection and the point of connection of the yielding means with the detector, said yielding means holding the detector in sliding engagement with the shoulder when said detector is being withdrawn and said withdrawing means moving the detector away from said means defining the pivotal connection.

3. In a side slip weft detector for weft replenishing looms, a support, a weft detector mounted on the support, said detector moving forward as a whole without angular movement relatively to the support on nonindicating detecting beats of the loom and said detector having an angular movement about a part of the support as a center on indicating detecting beats of the loom, vielding means to hold the detector norma ly in detecting position, and withdrawing means to move the detector as a whole from normal detecting position and away from the part of the support which serves as a center about which the detector moves when indicating, said yielding means being applied to the detector at a point intermediate the withdrawing means and the detecting surface of the detector.

4. In a .side slip weft detector for weft replenishing looms, a support, a weft de tector mounted on the support, said detector moving forward as a whole without angular movement relatively to the support on nonindicating detecting beats of the loom and said detector having an angular movement about a part of the support as a center on indicating detecting beats of the loom, yielding means to hold the detector in normal position, witlnlrawing means to move the detector against the action of the yielding means away from normal position and that part of the support which acts as a center for the detector on indicating movements, and a fixed guide along which a portion of the detector slides on withdrawing movements, the yielding means being interposed between the withdrawing means and the fixed guide.

In testimony whereof I have hereunto aflixed my signature.

' VICTOR H. JENNINGS.

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